System of method for dynamic range extension
US7856037B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 16, 2007 |
| Grant date | Dec 21, 2010 |
| Priority date | — |
| Expiry date | Nov 29, 2028 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01S3/10069
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
The present invention generally relates to the operation of optical network equipment such as optical amplifiers. In one aspect, a method of operating an optical amplifier is provided such that output of the optical amplifier avoids the effects of operating an optical gain medium in a non-linear (kink) region of an L-I curve. The method generally includes operating an optical gain medium in a fully off state or fully on state above the kink region with a PWM signal. In another aspect, the effects of the kink region may be compensated for by utilizing a lookup table. A sample of the optical power of an amplified optical signal may be used to select an entry in the lookup table that compensates for non-linearities in the kink region. In yet a further aspect, a lookup table may be used to control a pulse modulator to compensate for non-linearites in the kink region of the L-I curve.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.